The charged particles movement on the closed trajectories in the crossed constant electrical and magnetic fields

Charges motion trajectories peculiarity in the crossed electric and magnetic fields which strengths are inversely proportional to distance from axis of symmetry is turning points coordinates' exponential dependence on movement parameters. It leads to the isotopes ions trajectories remarkable distinction. The analytic forms for ions trajectories based on non-relativistic movement equations and trajectories closure conditions are obtained. As an example the trajectories of 6Li (dotted closed line) and 7Li (solid open line) ions are built. The separation possibility of these isotopes is discussed